Canvas.height | LuaRT free and open source Windows programming framework for Lua

Canvas.height read/write property

Get or set the height of the Canvas area. The height starts from 0 (top side of the Canvas) and increase to the bottom direction.

Example


local ui = require "ui"
require "canvas"

-- create a simple window
local win = ui.Window("Canvas.x sample", 600, 400)
local Canvas = ui.Canvas(win)
Canvas.align = "all"

function Canvas:onPaint()
  canvas:clear() 
  self:fillellipse(300,200, 50, 50, 0xdc4f2bff)
end

-- shows the window
win:show()

-- update user interface and increase Canvas horizontal position
repeat
  ui.update()
  Canvas.height = Canvas.height - 5
until not win.visible or (Canvas.height == 0)